body{
    display: flex;
    flex-direction: column;
}
body > header{
    flex-basis: 40px;
    display: flex;
    align-items: center;
}

body > header > input{
    margin-right: 10px;
    padding: 6px 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

body > header > input:focus{
    border-color: #66afe9;
    outline: 0;
    -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, .6);
    box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, .6);
}

header > a.btn{
    margin-right: 10px;
}

/* 新增缩放按钮样式 */
#nav-toggle {
    position: relative;
    z-index: 100;
    height: 40px;
    width: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
}

/* 缩放状态下的导航条样式 */
header.nav-collapsed img,
header.nav-collapsed nav:not(#gd-user-info-id) {
    display: none;
}